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RectorSeal No.5 is a non-hardening, slow-drying thread sealant made from special inert fillers dispersed in an oleoresinous base to facilitate its application to threaded pipe connections. Our pipe thread sealant is a soft-set, slow drying compound which seals, lubricates, and protects threaded pipe and fittings. Rectorseal No.5 pipe dope thread sealant lubricates and protects pipe threads. Lead free and contains no metal. Permits easy break out with no damage to threads. For pipe made of galvanized steel, iron, brass, copper, aluminum, stainless steel, polyethylene, reinforced fiberglass, and PVC. DO NOT USE ON ABS OR CPVC. For natural gas and water lines up to 2" and pressure up to 100 psi, the piping system may be placed into immediate service; other services are recommended 24 hours after application. FOR THE TRADESMAN: RectorSeal is recognized as a leading provider of quality solutions for the professional trades serving heating, ventilation, and air conditioning (HVAC/R), plumbing, electrical, and construction markets.
From the Manufacturer
RectorSeal No. 5 Special pipe thread sealant is a variation of the basic RectorSeal No. 5 formulation. For use where a low odor sealant with low temperature application is required.
Matt B
Reviewed in the United States on February 20, 2025
I’ve used this stuff for years on natural gas and propane lines and fittings. Works well.
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